Karting Tools is a set of tools dedicated to your Kart usage. This is not a game.Free features :- gear ratio calculator- stopwatch with lap history, best lap, lap difference, Excel export and share by email, Facebook, ...- worldwide tracks data : address, map, website, magnetic time lines, length, width, gear ratios, best lap- flags- maximum speed- average speed- fuel oil mix ratio- speed in Km/h or Mph, temperature in Celcius or Fahrenheit, wheel size in inch or cm- multilingual (english/french)Additionnal paid features :- Rotax Max Senior jetting : suggested main jet/pin height/spark plug based on the local weather, official chart value- stopwatch up to 3 drivers simultaneously with lap history, best lap, lap difference and share by email, Facebook, ...If you have any suggestion or if you find a bug, please send an email to android@kartingtools.com.Weather informations are provided by www.worldweatheronline.com